For the first question about pronunciation:

- A. **share** (pronounced with a long "a" sound)
- B. **sure** (pronounced with a "sh" sound leading to a long "u" sound)
- C. **wash** (pronounced with a short "a" sound)
- D. **visual** (the "vi" is pronounced with a "i" sound)

The word that differs in pronunciation is **C. wash**.

For the second question about primary stress:

- A. **tradition** (stress on the second syllable: tra-DI-tion)
- B. **classical** (stress on the first syllable: CLAS-si-cal)
- C. **different** (stress on the first syllable: DIF-ferent)
- D. **instrument** (stress on the first syllable: IN-stru-ment)

The word that differs in primary stress is **A. tradition**.